<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta content="text/html; charset=UTF-8" http-equiv="content-type">
<style>
.oauto {
overflow: scroll;
}
.ohidden {
overflow: hidden;
}
.border1 {
border: 20px solid green;
-webkit-border-radius: 50px;
}
.border2 {
border: 20px solid blue;
-webkit-border-radius: 50px;
}
</style>
</head>
<body>
<div class="oauto">
<div class="ohidden border1">
<div class="ohidden border2">
<div class="ohidden border1">
<div class="ohidden border2">
<div class="ohidden border1">
<div class="ohidden border2">
<div class="ohidden border1">
<div class="ohidden border2">
<div class="ohidden border1">
<div class="ohidden border2">
<div class="ohidden border1">
<div class="ohidden border2">
<div> </div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</body>
</html>